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中文摘要: 基于纳米SiO2表面羟基与γ-甲基丙烯酰氧基丙基三甲氧基硅烷间的偶联反应，在纳米SiO2表面引入可聚合双键。采用可逆加成断裂链转移（RAFT）聚合技术，以偶氮二异丁腈为引发剂，使SiO2表面接枝聚合苯乙烯。考察了二硫代苯甲酸异丁腈酯、二硫代苯甲酸苄酯、(1,2,4-三氮唑)基二硫代甲酸苄酯和二硫代新戊酸苄酯等对SiO2表面接枝聚合苯乙烯速率的影响。结果表明，SiO2表面接枝聚合苯乙烯的速率决定于RAFT试剂的Z基团结构。二硫代新戊酸苄酯调控的SiO2表面接枝聚合苯乙烯的速率最高。
Abstract:Double bonds were immobilized onto nano SiO2 via hydrolyzing alkoxysilane moiety of γ-methacryl trimethoxysilane for condensation with hydroxide groups from nano SiO2. RAFT grafting polymerization of styrene from nano SiO2 was carried out from the immobilized double bonds, in which azobisisobutyronitrile was used as initiator, 2-cyanoprop 2-yldithiobenzoate, benzyl dithiobenzoate, benzyl dithiopivalate, 1,2,4-triazolyl-1-carbodithioic acid benzyl ester were used as RAFT agent, respectively. Results showed that RAFT grafting polymerization rate of styrene from SiO2 was decided by Z group of RAFT agent. Grafting polymerization of styrene from SiO2 mediated by benzyl dithiopivalate exhibited the highest grafting polymerization rate.
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基金项目:唐山市科技局资助项目（07160213B）；唐山师范学院项目（07A02）
| 作者 | 单位 | |
| 李德玲 | 唐山师范学院化学系, 河北 唐山 063000 | delingshi@sina.com.cn |
| 王伟 | 唐山师范学院化学系, 河北 唐山 063001 | |
| 李平 | 唐山师范学院化学系, 河北 唐山 063002 | |
| 王东超 | 唐山师范学院化学系, 河北 唐山 063003 |
引用本文：
李德玲,王伟,李平,王东超.SiO2表面RAFT接枝聚合苯乙烯[J].功能高分子学报,2012,25(2):.
LI De ling,WANG Wei,LI Ping,WANG Dong chao.RAFT Grafting Polymerization of Styrene on the Surface of SiO2[J].Journal of Functional Polymers,2012,25(2):.
李德玲,王伟,李平,王东超.SiO2表面RAFT接枝聚合苯乙烯[J].功能高分子学报,2012,25(2):.
LI De ling,WANG Wei,LI Ping,WANG Dong chao.RAFT Grafting Polymerization of Styrene on the Surface of SiO2[J].Journal of Functional Polymers,2012,25(2):.
